Irma Wahyuny Ibrahim. (2006). A proposed esp syllabus design based on the perceptions, beliefs and attitudes of the students in Kolej Kemahiran Tinggi Mara Petaling Jaya. Fakulti Pengajian Bahasa, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Irma Wahyuny Ibrahim. A Proposed Esp Syllabus Design Based on the Perceptions, Beliefs and Attitudes of the Students in Kolej Kemahiran Tinggi Mara Petaling Jaya. Bangi, Selangor: Fakulti Pengajian Bahasa, Universiti Kebangsaan Malaysia, 2006.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Irma Wahyuny Ibrahim. A Proposed Esp Syllabus Design Based on the Perceptions, Beliefs and Attitudes of the Students in Kolej Kemahiran Tinggi Mara Petaling Jaya. Fakulti Pengajian Bahasa, Universiti Kebangsaan Malaysia, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.